import {VantComponent} from '../common/component'
import {getRect, requestAnimationFrame} from '../common/utils'

VantComponent({
  props: {
    text: {
      type: String,
      value: '',
      observer: 'init',
    },
    mode: {
      type: String,
      value: '',
    },
    url: {
      type: String,
      value: '',
    },
    openType: {
      type: String,
      value: 'navigate',
    },
    delay: {
      type: Number,
      value: 1,
    },
    speed: {
      type: Number,
      value: 60,
      observer: 'init',
    },
    scrollable: null,
    leftIcon: {
      type: String,
      value: '',
    },
    color: String,
    backgroundColor: String,
    background: String,
    wrapable: Boolean,
  },
  data: {
    show: true,
  },
  created() {
    this.resetAnimation = wx.createAnimation({
      duration: 0,
      timingFunction: 'linear',
    })
  },
  destroyed() {
    this.timer && clearTimeout(this.timer)
  },
  mounted() {
    this.init()
  },
  methods: {
    init() {
      requestAnimationFrame(() => {
        Promise.all([
          getRect(this, '.van-notice-bar__content'),
          getRect(this, '.van-notice-bar__wrap'),
        ]).then((rects) => {
          const [contentRect, wrapRect] = rects
          const {scrollable} = this.data
          if (contentRect == null ||
            wrapRect == null ||
            !contentRect.width ||
            !wrapRect.width ||
            scrollable === false) {
            return
          }
          if (scrollable || wrapRect.width < contentRect.width) {
            this.initAnimation(wrapRect.width, contentRect.width)
            this.scroll(true)
          }
        })
      })
    },
    initAnimation(warpWidth, contentWidth) {
      const {speed, delay} = this.data
      this.wrapWidth = warpWidth
      this.contentWidth = contentWidth
      // begin 0
      this.contentDuration = (contentWidth / speed) * 1000
      // begin -wrapWidth
      this.duration = ((warpWidth + contentWidth) / speed) * 1000
      this.animation = wx.createAnimation({
        duration: this.contentDuration,
        timingFunction: 'linear',
        delay,
      })
    },
    scroll(isInit = false) {
      this.timer && clearTimeout(this.timer)
      this.timer = null
      this.setData({
        animationData: this.resetAnimation
          .translateX(isInit ? 0 : this.wrapWidth)
          .step()
          .export(),
      })
      const duration = isInit ? this.contentDuration : this.duration
      requestAnimationFrame(() => {
        this.setData({
          animationData: this.animation
            .translateX(-this.contentWidth)
            .step({duration})
            .export(),
        })
      })
      this.timer = setTimeout(() => {
        this.scroll()
      }, duration + this.data.delay)
    },
    onClickIcon(event) {
      if (this.data.mode === 'closeable') {
        this.timer && clearTimeout(this.timer)
        this.timer = null
        this.setData({show: false})
        this.$emit('close', event.detail)
      }
    },
    onClick(event) {
      this.$emit('click', event)
    },
  },
})
